Apparatus for releasing glider planes



Dec. 16, 1930. Q ALWSTUR APPARATUS FOR RELEASING GLIDER PLANES FiledDec. 15, 1929 1771 8112 L or.

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w-m fly A i Patented Dec. 16, 1930 FATENTI H F E" osoAnALvIs'rUn, or oAKANncALIro APPARATUS FOR RELEASING ,GLIDERIPLAZNESI' Applicationfiled'December 1a,;i9'2a SeriaI rIo. 413,352.

This invention relates to improvementsin means for elevating the type ofairplane known as gliders for the purpose of initiating the flight ofthe same.

The pricipal object of the invention is to provide an economicallyconstructed and simply arranged apparatus whereby the glider can beelevated to the desired height and thereafter by a manipulation of acontrol cord or other actuating means the glider can be readily releasedto accomplish the desired gliding action. v

A further object is to provide an apparatus that is positive inoperation, durable and one which can be readily and quickly manip-'ulated. 7

Other objects and advantages will be apparent during the course of thefollowing description.

In the accompanying drawings forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame, 7

The figure is a side elevation of the apparatus constructed inaccordance with my invention and showing the same'elevated in proximityto a captive balloon preparatory to impelling the glider into flight. p

In the accompanying drawings wherein for the purpose of illustration isshown a preferred embodiment of my invention, the.

numeral 6 designates a captiveballoon which has depending therefrom asheave or pulley 7 over which there is trained an endless cable 8 inturn connected to a second sheave or pulley 9 that is fastened to theground in any convenient manner. The numeral 10 designates as a whole,the frame that serves as the medium for retaining thereon any type ofglider 11. This frame embodies in its construction a cross arm 12 thathas connected thereto reinforcing bars 13 and 14. The

frame is pivotally connected as at 15 to the front portion of theendless cable which portion of the cable, likewise beneath the point ofpivotal connection, is received in slots or recesses formed in the wings1'7 and 18 of the glider.

For the purpose of retaining the glider on the cross arm preparatory tothe flight of thesanie I employ on the topwing of the glider andcentrally thereof, a pair of spaced vertical arms 19; each of which hasmounted I thereon aflange roller 20,1 7 The numeral 2l designates a pullrjopeor cable thatisj connected as at 122 to thecross ttI'DT'lQ, whichcable is actuatedby theioccupant of the glider when he" desires to initiate flight of theship, [It willfbeflnoted that the crossarm whenactuated by'theoccupant' through the medium'of the pull cable 21 willcause the cross arm to assume asubs'tantially' horizontal position torelease the glider for flightl'lj 'j f 'c v The manner of raisingthe'frame on the endless-cable 8 is obvious, for actuation of the cableeither by means of a conventional Wench or other similar device willcause the cable to be reaved over the pulleys 7 and 9 and will conveythe frame and glider thereon to the desired height. V 1

Assuming that the glider hasbeen elevated to the position illustrated,in the drawing, the operator then pulls the cable or control'rope 21andthe frame will move from its full line position to the dotted lineposition, and the carrier wheels or rollers 20 traveling over the crossarm'12 will release the glider'from the frame and initiate the flight ofthe plane.

1 Should it be desired to release a miniature ortoy glider ora gliderthat has no occupant therein the control cord could be readilylengthened to contact the ground and from a this point actuation of thecontrol cord will readily release theglider for flight. It is to beunderstood that the form of my invention herewith shown and described isto be taken as a preferred example of the same and that various changesrelative to the 1 material, size, shape and arrangement of glidercarrying frame connected to said cable and adapted upon manual actuationto release the glider therefrom. a

2. The combination with a captive balloon, an apparatus for elevating aglider plane to propel the same into flight, comprising an endless cableconnected tothe balloon, a glider carryingframe pivotally connected tosaid cable, and'a control cable'connec'ted to said frame and under thecontrol of the occupant of the glider for releasing the gliderwfrom saidframe.

' 3. The combinationwitha captive balloon,

of an apparatus for raising a glider plane to propel the same intoflight, said apparatus in-" eluding means for elevating the balloon, aglider carryingflframe mounted on said last mentioned means and adaptedupon actuation of said frame-by theoc'cupantof the glider to propel theplane into flight.

4. The combination with a captive balloon,

of an apparatus for elevating and lowering a glider'plane,said apparatusincluding an endless cableconnectedto'the balloon, and a glider'carryingframe carried by said endless cable, and means carried by said frame forreleasing the glider therefrom to propel the plane into flight. I v

' In testimony whereof I aflixvmy signature.

OSCAR ALVISTUR,

